### Home > AC > Chapter 3 > Lesson 3.2.2 > Problem3-85

3-85.

For each equation, a possible solution is given. Check to see if the given solution is correct. Homework Help ✎

1. $3x+7=x−1,\ \text{solution}\ x=−4?$

Substitute the possible answer for $x$.

$3(−4)+7=(−4)−1$

If the numbers on both sides of the equation sign are true, then the possible answer is correct.

$−12+7=−5$
$−5=−5$

Yes

1. $−2x − 4 = −4x + 3,\ \text{solution}\ x = 3?$

Follow the steps in part (a).

No

1. $−3x + 5 + 5x − 1 = 0,\ \text{solution}\ x = 2?$

Follow the steps in part (a).

1. $−(x − 1) = 4x − 5 − 3x,\ \text{solution}\ x = 3?$

How does the negative in front of the parentheses change what is inside?

Follow the steps in part (a).